The basic tune is just that - a tune Vince has judged to be safe for stock all engines and it comes with no follow up. The more expensive tune is sent to you as a basic tune, you then do a data capture to see what it is doing on your specific car, email it back to Vince, he tweaks it, sends it back and repeat until you have the maximum your engine can handle safely all at no further charge.
The competition mode simply refers to what switch turns the Trifecta tune on (in this case the traction control button). The other common one to use is the cruise control.
When it is turned off, whatever you had in place before is back in control, so if you already had the GMPP tune, that's what will operate. The GMPP gives you 30 BHP and a ton of torque and the Trifecta tune gives you about 70 BHP (over dead stock tune, in other words 40 more than GMPP) and also more torque. Everyone that has reported back says it is tremendous bang for the bucks.
If you are not doing anything else to the engine, the basic Trifecta will probably do it for you. Even if you change intake piping, intercooler piping, exhaust and CAT, no additional special custom tuning is necessary. If you went to a bigger turbo, you'd need custom tuning and the more expensive version would be mandatory.
1957 Jamaican - MGA
1958 MGA Twincam
1962 MGA Coupe
1965 Jensen CV8
1969 MGC roadster,
1969 Lamborghini Islero S
1971 Jensen Interceptor
1988 Pontiac Fiero GT
2007 BMW Z4M coupe
2009 Pontiac Solstice GXP Coupe
Bill in BC